Adjustable lamp



NOV. 4 1924. 3,534,133

J. F. COURSON ET AL ADJUSTABLE LAMP Filed Dec. 9, 1921 FlE-l- Patented New. 4, 1924.

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JOHN F. COURSON AND PHILIP T. BRENDLINGER, Z6 PITCAIRN, PENNSYLVANIA.

ADiFUSTABLE teivir.

Application filed December 9, 1921. Serial in. 521,197.

Toull whom it may concern:

Be it known that we. JOHN F. CoUnsoN and PHILIP T. BRENDLINGER, citizens of the United States, residing at Pitcairinin the :1 county of Allegheny and State of Pennsyh Vania, have invented certain new and useful. improvements in Adjustable Lamps, of which the following is a specification.

Our invention refers to improvements in.

same, for supplying current to the lamp,

mounting the device in position. and various other features, as shall be hereinafter more tully described.

ferred embodiment of the invention,

Fig. 1 is a view of the device in elevation, with the lamp set for delivering a straight forward ray of light;

Fig. 2 is a similar view showing the lamp rotated to its uppermost position;

Fig. 3 is an enlarged longitudinal section showing the operative mechanism for rotating the lamp and its support upon the stationary base; and I Fig. 4: is a detail view of the operating terminal.

The lamp 2 is mounted by its base?) in the Socket 4. of the main lamp support 5. Such support is provided beyond the socket l with a reflector 6 and lens 7 of ordinary construction, for the purpose of projecting the rays of light outwardly in the usual way. 7

Within the rear portion of socket 4 is a contact member 8 for the base of lamp 3, to which current is supplied by wires 9 and 10, at any varying position of the base Wire 9 is connected with the terminal 11 of section 12 of the rotating mechanism, which is coupled by the universal joint 13 with the rearwardly extending rod 14, by which base 5 is rotated axially upon the relatively stationary base or mounting sup port 15. The latter is adapted to be mounted in any suitable manner, as by a clevis 16,

In the drawings illustrating one preon a bracket, fender, or other suitable sap,

portl'i, so as torigidly hold'the stationary base 15 in position. As shown, the rotating base 5 and. stationary base 15 are brought together'by angular or beveled faces, each base having a metallic conductingplate 18 19 respectively mounted thereon, with 'inte'r ening insulation 20 21' respebtively, plates 18 and 19 beingcap'able of continuous con tact at whatever position, base 5 maybe turned to. p o i lonductor wire 10 nan contact base 8 connects with conductor plate 18,..and a wire 22 connects the contact plate 19 with any suitable source of current, as a batteryor generator. A companion wire 23 is similarly connected, and leads the current through bushing 2a of rotating rod '14 to said rod. and thence by terminal 11 and wire ,9, closing the circuit to the lamp, as

will be readily understood;

Shaft 14 extends rearwardly through bushing2 l and is connected with a similar extended shaft 25 by a flexible coupling mechanism26 of well known construction, enabling the operator, byturning shaft 25, to impart'turning movement through shaft 14, universal joint 13, and stem 12, to the rotatable base 5' carrying the lamp and its reflector.

Shaft 25extends rearw'ardlyto any .de sired position within reach of the operator, and is provided with a terminal turning button or wheel 27, mounted in bracket 28, which may be located on any convenient adjacent support. I w

Shaft 25, in case of any limited longitudinal movement of base 5 in turning the lamp, is susceptible of a corresponding longitudinal movement, for which reason the interfitting terminal of the shaft is splined or squared to ensure turning engagement with the hub of wheel27, as indicated at 29. 'Outward tension on the shaft is exerted by means ofan inserted tween bushing 24 and the flange coupling 26 between shaft sections 14: and 25, whereby to maintain continuous tension, tending to hold the lamp supporting base 5 backwardly against the stationary base 15, and incidentally ensure close contacting engagement between the plates 18 and 19. By such construction, it will be seen that the base 5 may be turned to any degree upon base 15,so as to locate the lamp support and the lamp reflector and lens at any desired position within the range of movement described by the center line w-a in its annular sweep above the main longitudinal center line 6-1) of the stationary portions of the mechanism. 1

The pathof movement through which the lamp is capable of adjustment approximates the peripheral surface of a cone, the apex of which is at the juncture of lines a-a and ?)l), as clearly shown in Fig. 2. The lamp may, therefore, be thrown upwardly at very considerable angle, or laterally to one side or the other, to a corresponding degree, or may be located for throwing the rays straight ahead in its usual normal pos1- tion, as indicatedin Fig 1. c It will also be understood that by merely changing the chamfer or slope of the meeting faces of the bases 5 and 15 respectively, as to angle, or as to location with relation to the'horizontal plane of the normal center 1-71; or by relocating the base 15 by turning it axially to one side or the other and reclamping it, the amplitude of range of movement of the lamp may be correspondingly varied to any desired extent. The lamp is, therefore, capable of being set and adjusted to provide for practically any desired range of movement, and in either position is capable of being readily and easily operated by merely turning the terminal wheel or button 27 more or less.

The lampis adapted to easy application to motor driven vehicles in the manner of a spot light; 'it may be readily utilized on vessels or boats, or mounted on a stationary frame in connection with any of the various uses to which it is readily adapted. The construct-ion inmatters of size, design, de gree of angular mounting, or any other such changes, maybe readily made by the skilled mechanic, but all such are to be considered as within the scope of the following claims.

What we claim is:

1. An adjustable lamp of the class described comprising a supporting body having a continuously plane beveled bearing face thereon, a lamp carrying base movably mounted on the body having a corresponding continuously plane beveled bearing surface engaging the beveled surface of the body, and spring retracted means for rotatably holding the base against the body and for rotating it thereon so as to assume different angular positions with respect thereto. i

An adjustable lamp comprising a supporting member having a continuously plane beveled bearing face thereon, a lamp base mounted on the member having a corresponding continuously plane beveled bearing surface for cooperation with the beveled bearing face on said member, a shaft passing through the member and joined to a movable base, a retracting spring therefor, and a universal coupling in the shaft in juX- taposition to the cooperating beveled surfaces whereby said base may assume different angles upon being rotated with respect to said member.

3. An adjustable lamp comprising a supporting member having a beveled bearing face thereon, a lamp base mounted on said. men'iber having a beveled surface corresponding to the beveled face of said member and bearing thereagainst, a shaft slidably and rotatably received in the member and connected with said base through a flexible connection, said shaft serving to hold the base on said member, a resilient means engaging the shaft for yieldably holding the coacting beveled faces in contact, and an operating handle on the, shaft by means of which the base may be rotated, whereby it may be moved into different angular positions with respect to the supporting member.

4:. In a lamp of theclass described, the combination with a stationary base having an inclined face, of a rotatable lampsupporting base having a similar co-acting face, an operating rod extending through the stationary base and having a universal joint connection with a rotatable base, a retracting spring therefor, and means for maintaining circuit connections to the lamp base.

In testimony whereof we hereunto afiii; our signatures.

JOHN F. COURSON. PHILIP BRENDLINGER. 

